From: Zhihao Cheng <chengzhihao1@huawei.com>
Date: Tue, 7 Jul 2020 13:41:01 +0000 (+0800)
Subject: ubi: fastmap: Free fastmap next anchor peb during detach
X-Git-Tag: v5.10.7~1881^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c3fc1a3919e35a9d8157ed3ae6fd0a478293ba2c;p=platform%2Fkernel%2Flinux-rpi.git

ubi: fastmap: Free fastmap next anchor peb during detach

ubi_wl_entry related with the fm_next_anchor PEB is not freed during
detach, which causes a memory leak.
Don't forget to release fm_next_anchor PEB while detaching ubi from
mtd when CONFIG_MTD_UBI_FASTMAP is enabled.

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Fixes: 4b68bf9a69d22d ("ubi: Select fastmap anchor PEBs considering...")
Signed-off-by: Richard Weinberger <richard@nod.at>
---

diff --git a/drivers/mtd/ubi/fastmap-wl.c b/drivers/mtd/ubi/fastmap-wl.c
index 83afc00..28f55f9 100644
--- a/drivers/mtd/ubi/fastmap-wl.c
+++ b/drivers/mtd/ubi/fastmap-wl.c
@@ -381,6 +381,11 @@ static void ubi_fastmap_close(struct ubi_device *ubi)
 		ubi->fm_anchor = NULL;
 	}
 
+	if (ubi->fm_next_anchor) {
+		return_unused_peb(ubi, ubi->fm_next_anchor);
+		ubi->fm_next_anchor = NULL;
+	}
+
 	if (ubi->fm) {
 		for (i = 0; i < ubi->fm->used_blocks; i++)
 			kfree(ubi->fm->e[i]);